Most involved gang shootings in the south and west of the city. It has been dubbed America's "murder capital" with a higher rate of killings than New York or Los Angeles.

Cook County, which takes in Chicago, is believed to be the first city in the US to introduce a firearms tax. It was approved by county officials on Friday.

Father Michael Pfleger, pastor of St Sabina Church in the city's South Side, said the $25 levy is a start.

"Guns are causing carnage on our streets," he said.

"Anything that makes them harder to get hold of, no matter how small, is to be welcomed.

Image:Father Michael Pfleger has lobbied hard over gun laws

"We tax things like alcohol and cigarettes, but we haven't been taxing firearms.

"But I'd prefer if the tax was a lot higher, and if every single bullet was taxed."

A proposed tax of five cents per bullet was abandoned by Cook County because the tax would, in some cases, have exceeded the price of ammunition.

Officials said nearly a third of guns used in Chicago crimes were purchased legally in Cook County.

However, despite the surge in fatal shootings, gun control is not one of the big issues in the current presidential race - it was discussed only briefly in the second election debate.

Mr Obama, who has been attempting to win over conservative voters in battleground states, has refrained from stricter restrictions.

Father Pfleger, whose church is in the troubled Englewood area, has for years been lobbying for stronger gun laws, which are opposed by the National Rifle Association.

No fewer than 12 people have been shot dead in the three-square-mile Englewood district since the start of this year, according to RedEye, which tracks the latest figures from Chicago police and hospitals.

It lies a short drive away from the Kenwood family home of Mr Obama, who was a community activist in the South Side before entering politics. A man was shot a block away from his mansion in August.

Image:Chicago mayor Rahm Emanuel

In the summer, Chicago mayor Rahm Emanuel was in Englewood to announce a move to secure or demolish vacant buildings to stop gangs using them as gathering places.

He has also attempted to increase policing in the worst-hit areas, but the death toll continues to rise and the police force has been hit with budget cuts.

Hermene Hartman, publisher of N’Digo, a Chicago magazine focused on African-Americans, said the South Side was like a "war zone". Whoever ends up in the White House for the next four years needs to do more to focus on urban crime, she said.

"Nobody is talking about urban America, the fear that people suffer," she told Sky News.

"Here in Chicago, people have been dying in greater numbers than in Afghanistan.

"People are afraid of letting their kids go to school, play outside. They fear doing everyday things because people are being killed.

"How do we figure out what's making these kids so violent? We've got to focus on these crime areas."

Cook County's gun tax is expected to raise $600,000 (£375,000) next year, which will be contributed to healthcare for survivors of shootings.

The tax has been criticised by the Illinois State Rifle Association, which said people will simply travel elsewhere to buy guns.